BONITA  An early morning fire destroyed a two-story home in Bonita Friday and sent two people to the hospital with burn injuries and smoke inhalation, officials said.

The two-alarm fire was reported shortly after 3:30 a.m. on Lynndale Place south of Bonita Road near Interstate 805. When firefighters arrived, the house was "fully involved" in flames, making it impossible for firefighters to go inside, said Chula Vista Deputy Fire Chief Jim Garcia.

An elderly woman suffered moderate burn injuries and smoke inhalation and was transported to UCSD Medical Center. An elderly man suffered minor burns to his feet and smoke inhalation and was also taken to the hospital, Garcia said.

The fire was knocked down at 4:18 a.m. Fire crews were searching the home after getting conflicting reports that someone may still be unaccounted for.

"We are making sure we do a thorough search so we do account for everybody," he said.

The house, which is just outside Chula Vista city limits, is off a dirt road and is part of a compound of smaller outbuildings and trailers and campers. As many as 30 people were living on the property and residents told fire officials there was no power in the home, Garcia said.

"I was told that there hasn't been electricity to the house for a couple of months and they were working off portable generators and portable furnaces," Garcia said.

The cause of the fire is under investigation. Garcia said they will be looking at generators, heaters or candles as possible causes.

Firefighting efforts were delayed because of poor access. Firefighters had to hike up a driveway to get to the home.

The closest fire hydrant is about 1,500 feet down the road. There initially wasn't adequate water pressure. Garcia said, so a fire engine had to be hooked up to the hydrant to pump water to the top of the hill, a process known as relay pumping.

About 30 firefighters from Chula Vista, San Diego and Bonita fire departments responded.